<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01Demo</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app2">
    <input type="text" v-model="num">
    <button v-on:click="num++">点我++</button>
    <h2>{{name}}的点击次数为{{num}}</h2>
</div>
<script type="text/javascript">
    var app = new Vue({
        el: "#app2",
        data: {
            name: "itheima",
            age: 1,
            num: 0
        },
    });
</script>
</body>
</html>